KR102069401B1 - Apparatus for preparing the sealant composition and method for manufacturing the sealant composition using it - Google Patents

Abstract

The present invention relates to an apparatus for producing a sealant composition and a method for producing a sealant composition using the same, and more particularly, to prepare a modified silicone sealant composition containing a modified silicone as a main component so that the mixed components may be uniformly dispersed and blended. A disperser-type stirrer equipped with a paddle having a U-shaped wing in the direction, and further comprising a temperature control water jacket, and a sealant composition for producing a sealant composition using such a device. It is about a method. In the case of using the apparatus and method of the present invention, the dispersing effect due to the stirring of the high viscosity raw material component can be significantly improved, and the dispersibility is very excellent and homogeneous through the stirring speed of the stirrer, the stirring time, and the temperature control of the mixing vessel. One high quality sealant composition can be prepared stably.

Description

Apparatus for preparing the sealant composition and method for manufacturing the sealant composition using it}

The present invention relates to an apparatus for producing a sealant composition and a method for producing a sealant composition using the same, and more particularly, to prepare a modified silicone sealant composition containing a modified silicone as a main component so that the mixed components may be uniformly dispersed and blended. Dissolver provided with a paddle having a U-shaped wing in the direction (di, and further comprising a temperature control water jacket, and a method for producing a sealant composition using such a device) .

Sealant is an elastic sealing material that prevents shortening the lifespan of buildings caused by climate effects such as high temperature and high humidity in buildings, and is filled to maintain waterproofness and airtightness of joints and crevices of buildings. It is a material that serves as an important member for use.

The mixed component used to prepare the sealant composition is composed of a silicone compound and various additives. In order to disperse | distribute the mixed component of such a sealant composition uniformly, the manufacturing apparatus provided with the stirring apparatus is used.

However, as the additives added to the sealant composition vary, it is not easy to include various additives in the sealant. That is, in order to manufacture the sealant, a crosslinking agent, a viscosity-hardening agent, and the like are added to the liquid silicone having a viscosity of about 50,000 cps and stirred to increase the viscosity to about 1,000,000 cps and commercialize the product. Therefore, in order to manufacture a high viscosity sealant composition, it is difficult to expect a uniform dispersion effect with a planetary structure-type batch mixer (stirrer), which is a conventional method, it is difficult to produce a high quality sealant.

The general-purpose sealant most commonly used in construction sites has a chemical smell after construction and has a problem of generating environmental hormones that are harmful to the human body. Recently, the necessity of eco-friendly materials is emerging in general construction materials.

For this reason, there is a growing interest and demand for "modified silicone (MS) -based sealants", which are eco-friendly sealing materials whose main components are eco-friendly modified silicones (organic polymers having organosiloxanes).

Such modified silicone sealants have been spotlighted as eco-friendly sealants because they have little contamination by stones (granite), have good elasticity, excellent weather resistance and durability, and can be surface coated.

In other words, modified silicone sealant has the coating property which is the advantage of urethane sealant, elastic restoring force which is the biggest advantage of silicone, and excellent weather resistance and adaptability to external environment (weather, temperature, UV resistance). Is being expanded, and is most commonly used in Japan.

In addition, due to the strengthening of building safety management, the demand for special purpose sealants for building fire prevention, such as flame prevention sealants, is also gradually increasing.

However, in the case of the modified silicone sealant composition, it is difficult to uniformly disperse the mixed components in comparison with other sealants in that curing is slow and it is necessary to mix in a two-component form in the manufacturing process, and a designated primer should be used.

In particular, due to the increasing demand of various high functional sealants as described above, in order to manufacture a high functional sealant, it is urgent to develop a manufacturing method for adjusting the raw material formulation and content ratio of various additives for each function. Among them, in order to sufficiently disperse mixing of additive materials in the raw material composition composed of such a modified silicone-based mixed component, a manufacturing apparatus having a high-dispersion type special stirrer for stirring the sealant composition, which generally corresponds to a high viscosity of 1,000,000 cps, is required. The demand for such devices is increasing.

As a stirring apparatus used for mixing a conventionally known composition, Korean Patent No. 10-1179201 relates to a stirrer capable of pulverizing and stirring a stirring object in a stirring tank, and a rotating stirring blade rotating inside and a stirring tank inner surface. Has proposed a device configuration including a fixed stir blade protruding in the rotation axis direction.

However, the stirrer is configured to perform grinding and stirring at the same time, and it is difficult to apply to the dispersion of high viscosity mixed components such as sealant compositions.

In addition, the stirring device configuration currently used in the manufacture of the sealant composition on the market, as shown in Figure 1, the planetary structure type batch mixer (stirrer) having a simplified form in one direction is used.

However, such a conventional stirrer device has a problem that it is not possible to uniformly disperse various additives contained in the high viscosity silicone mixed component. That is, when the sealant is manufactured using the existing planetary structured stirrer, physical property variation occurs for each batch or lot. In addition, in the manufacturing of silicon, since the reaction state is changed when mixing materials having different specific gravity and properties of various raw materials, there is a problem of physical properties due to technical limitations that do not achieve sufficient dispersion effect.

On the other hand, Korean Patent No. 10-1311189 discloses a method for producing a fireproof sealant composition, the silicone compound base resin is compounded at 100 ~ 200 ℃ for 5 to 6 hours, and added to the carbon black master batch 30 to 40 The process of further kneading at 30 degreeC for 45 minutes is proposed.

However, in this manufacturing method, the effect of improving the properties of the sealant composition can be expected, but the improvement on the stirrer used in the kneading process is not reflected at all, and there is room for improvement in the method of the manufacturing apparatus and the kneading process. In particular, in order to improve the dispersibility and physical properties of the sealant composition, it is required to improve the application of the stirrer and the conditions of the manufacturing process.

Korean Patent Registration No. 10-1179201 Korean Patent Registration No. 10-1311189

In order to improve the problems of the prior art as described above, the present invention is to improve the dispersibility of the sealant composition by improving the conditions for stirring the mixed components of the silicone compound and additives, and the production method with more excellent dispersing effect The provision of is a challenge.

It is therefore an object of the present invention to provide an apparatus for producing a sealant composition with a new stirrer configuration used for producing the sealant composition.

In addition, another object of the present invention is to provide a water jacket to the outside of the stirrer to which the stirrer used to prepare the sealant composition is applied, the apparatus for producing a sealant composition to further increase the dispersibility by allowing temperature control during the mixing of the composition To provide.

In addition, another object of the present invention to provide a method for producing a sealant composition to have a more efficient and excellent dispersibility by using the apparatus for producing a sealant composition of the new structure as described above.

In order to solve the problems of the present invention as described above, the present invention is an apparatus for producing a sealant composition comprising a stirrer for stirring and dispersing the mixed components constituting the sealant composition in the manufacturing process of the sealant composition, the stirrer is a cylindrical mixing vessel There is a pair of rotatable paddles in the chamber, each of which is provided with wings with four to four c-shaped grids facing each other, and the pair of paddles It is installed so as to be located at different heights, and the upper end of the mixing vessel is installed at a predetermined interval and inclined along the wall of the bottom of the mixing vessel and the container wall below the middle of the mixing vessel, and the upper portion of the upper and lower openings Of the stirring member is rotatable, so that the inside of the rotating radius while the stirring member is rotating Standing arranged paddle of the pair are rotatably provides a device for manufacturing a composition consisting of a sealant.

According to a preferred embodiment of the present invention, the manufacturing apparatus further includes a water jacket that is installed to enable temperature control in a form wrapped around the outer side of the cylindrical mixing vessel, the water jacket is covered with a heat insulating outer surface Its inner side is in direct contact with the wall of the mixing vessel, the inside of the water jacket is a hot and cold water supply pipe is tightly arranged to supply hot water or cold water and the heat exchange liquid to transfer the heat generated from the cold and hot water supply pipe into the mixing vessel It is charged.

In addition, the present invention is to produce a sealant composition using the apparatus for producing a sealant composition containing the stirrer, raw material injection step of putting a silicon compound and additives in the mixing vessel; A raw material mixing step of rotating the pair of paddles installed in the mixing vessel under vacuum while injecting the raw materials at 100 to 500 rpm, and simultaneously dispersing the raw materials by mixing the raw materials by rotating the stirring member at 100 to 500 rpm; It provides a method for producing a sealant composition comprising the step of preparing a sealant composition by maintaining the internal temperature of the mixing vessel to 100 ~ 200 ℃ using the water jacket during the execution of the raw material mixing step.

According to the present invention, by renewing the structure of the stirrer in the apparatus used for the production of the sealant composition, it is possible to improve the dispersibility of the high viscosity sealant composition with a viscosity level of 1,000,000 cps during the raw material mixing process of the sealant composition.

In particular, it is easy to set the conditions according to the manufacturing process characteristics such as temperature, stirring rpm, stirring time, cooling, etc., which are necessary to enable effective dispersion of additives that are difficult to disperse in mixing high viscosity raw material components, There is an effect that the acid is improved very well.

In addition, according to the device configuration and manufacturing method according to the present invention, by using a water jacket of a specific configuration, there is an advantage of maintaining the temperature using hot water or cooling water, there is no change in physical properties in the manufacturing process, the production of high-quality sealant composition Has the possible effect.

1 is a diagram schematically showing a stirrer structure applied in a device used for preparing a conventional sealant composition.
Figure 2 is a diagram schematically showing an embodiment of the configuration of the stirrer applied to the apparatus for producing a sealant composition according to the present invention.
3 is a view showing the configuration of a water jacket additionally mounted outside the mixing vessel of the stirrer according to the present invention.
Figure 4 is an image showing the simulation results of the longitudinal vector according to the stirring state for the case of applying the conventional stirrer (existing blade) of Figure 1 and the stirrer (improved wing) structure of the present invention of Figure 2, respectively.
FIG. 5 is an image diagram illustrating a streamline simulation result according to the stirring state for the case where the conventional stirrer (existing blade) of FIG. 1 and the stirrer (improved wing) structure according to the present invention of FIG. 2 are applied.
FIG. 6 is an image diagram illustrating a simulation result of velocity distribution according to the stirring state for the case where the conventional stirrer (existing wing) of FIG. 1 and the stirrer (improvement wing) structure according to the present invention of FIG. 2 are applied.
7 is an image diagram showing a comparison result of the sealant convection heat transfer state according to the stirring state for the case of applying the conventional stirrer (existing blade) of Figure 1 and the stirrer (improving blade) structure of the present invention of FIG. .

Hereinafter, the present invention will be described in more detail as one embodiment.

The present invention relates to a manufacturing apparatus including a stirrer used to prepare a sealant composition, characterized in that the wing structure of the stirrer is configured differently than before.

1 is a view schematically showing a stirrer structure applied in the conventional sealant composition manufacturing apparatus.

1, the conventional stirrer 10 consists of a stirrer having a pair of vanes 40a and 40b made of a magnetic lattice 30 that rotates in a cylindrical vessel 20, respectively. The stirrer 10 having such a conventional blade is to stir the sealant composition in the mixing vessel 20 while the blades 40a and 40b rotate in the same direction so that the sealant raw materials are dispersed while being mixed.

The present invention proposes a new stirrer having a different wing structure from the existing stirrer.

Figure 2 is a diagram schematically showing an embodiment of the configuration of the stirrer applied to the apparatus for producing a sealant composition according to the present invention.

According to a preferred embodiment of the present invention, the stirrer 100 of the present invention having an improved wing is provided with a pair of rotatable paddles (300a, 300b) in the cylindrical mixing vessel 200, the The lower end of each paddle (300a, 300b) can be made of a structure that is provided with wings 400a, 400b in which four U-shaped lattice in four rooms are opposed to each other. These four U-shaped gratings are installed on the paddles 300a and 300b so that each of the individual gratings forms a quadrangular lattice structure.

According to a preferred embodiment of the present invention, the wings 400a, 400b of the c-shaped lattice of each paddle 300a, 300b are 20-50 degrees, most preferably four c-shaped lattice obliquely in the same direction. It is installed in a shape inclined at the same angle while having an inclination angle (a) of 25 to 35 degrees, it is configured to form a wing (400a, 400b) of the structure twisted in one direction as a whole to further improve the stirring effect.

According to a preferred embodiment of the present invention, the four U-shaped lattice constituting the wings of the paddles (300a, 300b) has a slope inclined in the opposite direction to the rotation direction in compliance with the direction in which the paddles (300a, 300b) rotates. Can be configured to

In FIG. 2, the pair of paddles 300a and 300b may be installed so that the wings 400a and 400b of the two paddles are positioned at the same height, but may be installed to be positioned at different heights.

According to a preferred embodiment of the present invention, the position of the paddles (300a, 300b) of the stirrer 100, most preferably of the sealant composition to be filled in the mixing vessel 200 in consideration of the size of the mixing vessel 200 The height of the mixed raw material is preferably positioned at 1/3 and 3/2 height, respectively, and is preferably installed at positions 3/1 and 3/2 to the left and right with respect to the diameter of the mixing vessel 200. It is preferable to configure the paddles 300a and 300b in such a position in consideration of the height and spacing of the paddles 300a and 300b.

The blades 400a and 400b of the stirrer 100 according to the present invention have the characteristics of a dissolver type stirrer that is completely different from the structures of the wings 40a and 40b of the stirrer 10, which is known in the art. Even for high viscosity composition components, it is possible to obtain excellent dispersion effects that cannot be achieved with a conventional stirrer.

According to the present invention, the shape of the wing (400a, 400b) is a very characteristic structure, the rotational power of the stirrer, average flow rate, stream line and velocity distribution analysis, fluid flow resistance, turbulent kinetic energy, maximum stress on the wing and By analyzing very complex factors such as strain and stirring conditions, it is designed as a characteristic structure of the present invention in consideration of durability and stability.

In addition, according to a preferred embodiment of the present invention, the inner lower portion of the mixing vessel 200 is installed with a predetermined interval and inclination along the mixing vessel bottom portion 210 and the container wall surface 220 below the middle of the mixing vessel and The stirring member 500 of the upper lattice-shaped grating-shaped lattice structure is installed to be rotatable.

According to the present invention, the stirring member 500 of the magnetic lattice structure having the ordinary light beam narrowing structure is inclined at an inclination angle (b) of 5 to 20 degrees, more preferably 7 to 12 degrees, with the wall of the mixing vessel 200. It may be made in the form. In addition, the stirring member 500 may be installed at predetermined intervals, for example, 10 to 50 cm so as not to contact the container wall surface 220 of the mixing vessel 200. However, the interval may vary significantly depending on the size of the mixing vessel 200.

According to the present invention, the stirrer 100 of the present invention is the pair of paddles (300a) inside the rotation radius of the stirring member 500 while the stirring member 500 in the lower portion in the mixing vessel 200, 300b) may be arranged to be rotatable.

Therefore, according to the present invention, if the raw material component of the sealant composition is injected into the mixing vessel 200 and then the stirrer 100 is operated, the wings 400a installed in the pair of paddles 300a and 300b in the central portion of the mixing vessel 200. , 400b) is rotated, the stirring is made, and the lower and the edge in the mixing vessel 200 is configured in a structure that the stirring is performed while the stirring member 500 is rotated.

In addition, according to a preferred embodiment of the present invention, the manufacturing apparatus is a water jacket that is installed to enable the temperature control in the form surrounded by the outer side of the cylindrical mixing vessel 200 is provided with the stirrer (100) ( 600) may be further included.

According to the present invention, the water jacket 600 may be applied to the mixing vessel 200 in a form in which the outer side surface is covered with the heat insulating material 610 and the inner side thereof is in direct contact with the outer wall surface of the mixing vessel 200. .

3 is a view showing the configuration of the water jacket 600 mounted to the outside of the mixing vessel 200 of the stirrer 100 according to the present invention.

According to a preferred embodiment of the present invention, the cold and hot water supply pipe 620 to which hot or cold water is supplied is closely arranged in the water jacket 600.

The cold and hot water supply pipe 620 may preferably have a vertically arranged structure.

Cold and hot water supply pipe 620 of the present invention may be vertically arranged while being connected to one or several independent connection structure, or each independent structure.

In addition, the cold and hot water supply pipe 620 of the present invention is made so that the cold or hot water is supplied for each of the connection structure or separately, it can be installed so that the hot water is supplied from the top and the cold water is supplied from the bottom.

 According to a preferred embodiment of the present invention, the heat jacket 600 may be configured to be filled with a heat exchange solution 630 to transfer the heat generated from the cold and hot water supply pipe 620 into the mixing vessel 200. As the heat exchange liquid 630 used herein, water may be used. When the heat exchange solution 630 is used as described above, the heat exchange efficiency may be increased when supplying cold or warm heat generated from the cold / hot water supply pipe 620 to the surface of the mixing vessel 200.

When the sealant composition is manufactured using the manufacturing apparatus including the stirrer according to the present invention as described above, the dispersion effect may be improved by 50% or more as compared to the case of using the apparatus to which a stirrer having a conventional wing shape is applied.

In the present invention, as an experimental example, in order to check the dispersion effect on the stirrer having the improved wing structure of the present invention as described above, various simulations were performed in comparison with the conventional stirrer. The results are shown in comparison with FIGS. 4 to 7.

Figure 4 is an image showing the simulation results of the longitudinal vector according to the stirring state for the case of applying the conventional stirrer (existing blade) of Figure 1 and the stirrer (improved wing) structure of the present invention of Figure 2, respectively.

5, 6 and 7 are streamline simulation results according to the stirring state for the case where the conventional stirrer (existing wing) of FIG. 1 and the stirrer (improvement wing) structure according to the present invention of FIG. 2 are applied, respectively. , An image diagram showing the results of the velocity distribution simulation results and the comparison results of the sealant convective heat transfer states, respectively.

In the simulation results as described above, when the blade structure of the stirrer is compared with the case of applying the existing blade and the case of applying the stirrer having the improved wing structure according to the present invention, the stirrer of the improved structure according to the present invention In the case of using the attached device, it is confirmed that the dispersing effect is greatly improved in the mixing and stirring process of the high viscosity sealant raw material component, and exhibits a very excellent stirring effect.

Therefore, when the sealant composition is manufactured using the manufacturing apparatus including the stirrer of the improved structure according to the present invention, a very excellent dispersion effect can be obtained.

In addition, when the temperature control is applied by applying the above water jacket, it is possible to maximize the uniform dispersion effect, and in particular, there is an advantage of maintaining the temperature using hot water or cooling water, so that there is no change in physical properties in the manufacturing process, the sealant composition of high quality It can be manufactured.

On the other hand, it will be described in detail the method for producing a sealant composition using the stirrer as described above according to the present invention.

The present invention includes a method for producing a sealant composition using the stirrer according to the present invention as described above.

Method for producing a sealant composition using the stirrer according to the present invention is as follows.

In the present invention, the silicon compound and the additive is subjected to a raw material injection step into the mixing vessel of the stirrer.

According to the present invention, the silicon compound used herein can be applied to the case of a conventional silicon compound, as well as a high dispersion effect can be obtained due to the preferred stirrer configuration even when applying a modified silicon compound.

Examples of the raw material used in the present invention include 100 parts by weight of a silicone compound base resin including 50 to 70% by weight of polymethylvinylsiloxane resin, 10 to 30% by weight of silicon dioxide, and 10 to 30% by weight of quartz powder; 10 to 20 parts by weight of carbon black masterbatch kneaded with 25 to 40% by weight of carbon black, 25 to 40% by weight of silicone resin and 25 to 40% by weight of organic solvent; A mixture consisting of 1 to 3000 ppm of addition reaction catalyst and 5 to 20 parts by weight of organohydrogenpolysiloxane may be used.

Further, as examples of other raw materials, 30 to 40% by weight of modified silicone (MS) polymer, which is a silicone material, 10 to 15% by weight of silicone plasticizer, 3 to 5% by weight of crosslinking agent, 15 to 25% by weight of flame retardant, silica and silane 30 to 40% by weight of a mixed ingredient of at least one additive selected from a tackifier, a UV stabilizer, and an addition reaction catalyst may be used. Here, as the flame retardant 15 to 25% by weight, a mixture of 5 to 10% by weight of expanded graphite and the usual flame retardant corresponding to the remaining content can be used with respect to the total composition.

According to the present invention, the raw material components as described above may be applied to a stirrer capable of the desired dispersion even when using a raw material having a high viscosity in the range of 1,000,000 ~ 1,500,000cps.

According to the present invention, the raw material components used in the raw material injection step may be injected into a mixing vessel in which a stirrer is installed by adding and mixing a part of the raw material in a master batch form. For example, the silicone compound base resin may be separately prepared, and the flame retardant masterbatch may be separately prepared and mixed.

According to the present invention, while injecting the raw material while rotating a pair of paddles installed in the mixing vessel under vacuum at 100 ~ 500rpm, while rotating the stirring member at 100 ~ 500rpm to disperse while mixing the raw material by mixing It goes through the raw material mixing step.

According to a preferred embodiment of the present invention, the rotation direction of each paddle and the stirring member in the stirrer may be configured to rotate in the same direction or to rotate in the opposite direction. However, it is desirable to determine the rotation direction in consideration of the direction in which the blade is inclined.

According to the invention, it is advantageous for the dispersion effect to rotate the pair of paddles preferably in opposite directions.

According to a preferred embodiment of the present invention, after the raw material injection in the mixing step, it is possible to start agitation in a vacuum state. At this time, the stirring may be carried out by mixing at 100 ~ 500rpm, more preferably 300 ~ 450rpm.

According to the present invention, the stirring time for mixing the raw materials may be mixed by stirring for 1 to 5 hours, more preferably 2 to 4 hours. However, the stirring time can be appropriately adjusted according to the injection amount of the raw material, the injection method, the stirring speed and the like.

According to a preferred embodiment of the present invention, when the mixing is completed in the mixing step, additionally stop the operation of the stirrer can be carried out hera operation. In addition, when the Hera operation is completed, the stirring is performed again, maintaining the vacuum state, the process of dispersing the raw material components and removing bubbles, and then removing the vacuum to complete the production of the sealant composition.

According to the present invention, the stirring speed of the paddle and the stirring member may include a step of preparing a sealant composition by maintaining the internal temperature of the mixing vessel at 100 to 200 ° C. using the water jacket during the mixing of the raw materials. .

Here, the water jacket can supply the hot and cold water through the cold and hot water supply pipe and adjust the supply amount to maintain the temperature in the mixing vessel at a desired temperature.

According to a preferred embodiment of the present invention, when the sealant composition is prepared using the manufacturing apparatus equipped with the stirrer of the improved structure according to the present invention as described above, the stirrer is a very homogeneous mixture of high viscosity sealant and various mixtures of 1,000,000 cps or more You can mix in the state.

In particular, according to the present invention due to the stirrer structure having the improved blade as described above, the dispersion effect by the stirring of the high viscosity raw material components can be improved significantly. Therefore, it is possible to stably prepare a high quality and homogeneous sealant composition having excellent dispersibility through the stirring speed of the stirrer having such an improved wing, the stirring time, and the temperature control of the mixing vessel.

In addition, the apparatus for producing a sealant composition having a stirrer according to the present invention is equipped with a water jacket on the outer surface of the mixing vessel of the stirrer, by manufacturing so as to control the temperature according to the viscosity during the stirring of the raw material components, including a variety of universal sealant It is possible to produce different kinds of sealants with a single device, thus increasing the effectiveness of the production facilities of sealants.

10, 100-agitator
20, 200-Mixed Container
210-bottom
220-container wall
30-grid
40a, 40b, 400a, 400b-wings
300a, 300b-paddles
500-Stirring member
600-Water Jacket
610-Insulation
620-Hot and Cold Water Pipe
630-Heat Exchanger

Claims (10)

In the manufacturing apparatus of the sealant composition comprising a stirrer for stirring and dispersing the mixed components constituting the sealant composition in the manufacturing process of the sealant composition,
The stirrer is provided with a pair of rotatable paddles (paddle) in the cylindrical mixing vessel, each paddle is provided with four wings in the four sides of the grid installed opposite each other, each of the paddles The wings are installed in a shape in which four U-shaped grids are inclined at the same angle with each other having an inclination angle of 20 to 50 degrees obliquely in the same direction, forming a wing shape of the structure twisted to one side as a whole, and the blade of the paddle The four U-shaped grids are inclined in a direction opposite to the direction of rotation in accordance with the direction of rotation of the paddle,
The inner lower end of the mixing vessel is installed to have a predetermined interval and inclination along the bottom of the mixing vessel and the container wall below the middle of the mixing vessel, and the stirring member of the upper lattice structure of the upper lattice structure is rotatable. The pair of paddles is rotatably disposed within a rotation radius of the stirring member while the stirring member rotates, and the stirring member of the magnetic lattice of the light beam narrowing structure has an inclination angle of 5 to 20 degrees with the mixing vessel wall surface. In the form of a gap
It further includes a water jacket is installed to enable a temperature control in the form wrapped around the outer side of the cylindrical mixing vessel, the water jacket is the outer side is covered with a heat insulating material and the inner side is directly in contact with the wall surface of the mixing vessel Abutment, inside and outside of the water jacket is arranged a cold and hot water supply pipe for supplying hot or cold water and the heat exchange liquid is filled to transfer the heat generated from the cold and hot water supply pipe into the mixing vessel .
delete delete The apparatus of claim 1, wherein the pair of paddles are installed such that the wings of the two paddles are positioned at the same height or at different heights. delete delete delete delete delete delete

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